I tried messing around more as I really believe you can save more then that. I found this page on Mousesavers where you can still see the WDW prices for NE.
http://www.mousesavers.com/disney-world-magic-your-way-ticket-price-chart/
I started looking at it a bit and I noticed that 8 day ph/wpfm/ne would be 2789.85. They would have a full gate value of 3094.89 which is more then the cost of APs, but still seems like it nets you the highest savings since you wouldn't have to pay anything else to upgrade. The savings would be about $267 for these.
Anyway, have fun messing around with it. Also, one thing I thought about was that you don't have to buy the same tickets for kids and adults. The kids seem like a no brainer at the 8 day ph/wpfm/ne as the credit you get is exactly the cost of an AP (611.31) but they only cost 553.95. The adults are the ones that push the value higher. If that makes any sense. Good luck!
Padawans - Did you buy your NE tix before the big ticket increase last year? That might be why your savings were so much higher.
Miss - I think traveling on your anniversary would be cool! Date night maybe?